Delineation Section 11 - Pavement markings at roundabouts

The delineation guidelines have been developed to assist in designing and maintaining a quality delineation system.

The guidelines are to comprise 19 sections and an appendix. These are initially being released individually and in no specific order. The sections which are to be released are as follows:

Part Title

Section 1 Introduction

Section 2 Delineation principles

Section 3 Pavement markings

Section 4 Longitudinal markings

Section 5 Enhanced longitudinal markings

Section 6 Transverse markings

Section 7 Transverse markings - Pedestrian facilities

Section 8 Diagonal and chevron markings

Section 9 Messages on pavements

Section 10 Pavement arrows

Section 11 Pavement markings at roundabouts

Section 12 Pavement markings for bicycle facilities

Section 13 Pavement markings for kerbside parking restrictions

Section 14 Maintenance of pavement markings

Section 15 Raised pavement markers

Section 16 Guide posts and delineation of safety barriers

Section 17 Alignment signs and markers

Section 18 Delineation systems

Section 19 Delineation management and audit

Appendix A Locating and setting out of dividing (barrier) lines

To determine which sections are currently available go to:

www.rta.nsw.gov.au/doingbusinesswithus/downloads/technicalmanuals/delineation_dl1.html

The information contained in the various parts is intended to be used as a guide to good practice. Discretion and judgement should be exercised in the light of the many factors that may influence the choice of delineation devices in any situation. The guidelines make reference, where relevant, to current Australian Standards and are intended to supplement and otherwise assist in their interpretation and application.

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Delineation

Section 11

PAVEMENT MARKINGS AT ROUNDABOUTS

Special Note:

As from 17 January 2011, the RTA is adopting the Austroads Guides (Guide to Traffic Management) and Australian Standards (AS 1742, 1743 & 2890) as its primary technical references.

An RTA Supplement has been developed for each Part of the Guide to Traffic Management and relevant Australian Standard. The Supplements document any mandatory RTA practice and any complementary guidelines which need to be considered.

The RTA Supplements must be referred to prior to using any reference material.

This RTA document is a complementary guideline. Therefore if any conflict arises, the RTA Supplements, the Austroads Guides and the Australian Standards are to prevail.

The RTA Supplements are located on the RTA website at www.rta.nsw.gov.au

ii Version 1.1 UNCONTROLLED WHEN PRINTED

Roads and Traffic Authority www.rta.nsw.gov.au

VERSION: 1.0 ISSUED: February 2010

AMENDMENTS: Refer to Amendment Record APPROVED BY: SIGNED SIGNED

Phil Margison Michael de Roos General Manager General Manager Traffic Management Safer Roads

AUTHORISED FOR USE BY: SIGNED

Peter Collins Director Network Management

© 2009 Roads and Traffic Authority NSW

Extracts from these guidelines may be reproduced providing the subject is kept in context and the source is acknowledged.

Every effort has been made to supply complete and accurate information. However RTA, NSW assumes no responsibility for its use.

All trade name references herein are either trademarks or registered trademarks of their respective companies.

For policy and technical enquiries regarding these guidelines please contact:

Traffic Management Branch Email: technical_directions_publication@rta.nsw.gov.au

To access electronic copies of these and other guidelines go to: www.rta.nsw.gov.au/doingbusinesswithus/downloads/technicalmanuals/technicalmanuals_dl1.html

For the latest amendments (if any) to these guidelines go to: www.rta.nsw.gov.au/doingbusinesswithus/downloads/technicalmanuals/delineation_dl1.html

ISBN 978-1-921242-89-2 (Electronic only) RTA/Pub. 08.091

Delineation – Section 11 Pavement markings at roundabouts

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Contents

11.1 General ..............................................................................................11-1

11.2 Applications of pavement markings at roundabouts ...................11-2

Delineation – Section 11 Pavement markings at roundabouts

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Amendment record Please note that the following updates have been made to this document. Amendment

No Page Description Issued Approved

By 1 11-1 Width of line Type TB altered December

2010 R O’Keefe Mgr Traffic Policies, Guidelines & Legislation

Delineation – Section 11 Pavement markings at roundabouts

11.1 General

A roundabout is a channelised at grade intersection at which all traffic

moves clockwise around a central traffic island.

A multi-lane roundabout is a roundabout with one or more entry and/or

exit lanes and part or all of the circulating carriageway designed for or

operated as two lanes of traffic.

Roundabouts are generally not to have more than two circulating lanes.

A spiral curve pavement marking is the pavement marking used to

introduce an additional lane within the circulating carriageway (See Figure

11.5) of a multi-lane roundabout or to direct traffic from a single lane entry

into an outside circulating lane.

A splitter island is a traffic island placed within a leg of the roundabout

separating entering and exiting traffic and designed to deflect entering

traffic.

The pattern and dimensions for line marking at a roundabout are shown in

the Table 11.1.

Table 11.1: Linemarkings at Roundabouts

Holding lines at roundabouts are installed in accordance with the general

principles applied to other intersection types. The leading edge of the

holding line forms a prolongation of the kerb and the painted outline of the

traffic island on the approach.

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Delineation – Section 11 Pavement markings at roundabouts

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11.2 Applications of pavement markings at roundabouts

Pavement arrows (refer to Section 10 for pattern and dimensions) are

installed on the approaches to a multi-lane roundabout to make the entry

lane selection mandatory. In addition, exit line marking (L4) is marked on

the circulation carriageway to assist motorists to choose the correct lane

when exiting the roundabout.

Examples of various types of roundabouts are given in Figures 11.1 to 11.4.

The multi-lane roundabouts with dual right turn pavement markings are

shown in Figure 11.5.

Notes:

• The entry immediately to the right of a dual lane right turn must be

a single lane entry or a dual lane entry with a mandatory left turn.

• The single entry lane must spiral to the outside circulating lane to

avoid a conflict between the single right turn vehicle exiting from

the centre lane and the right turning vehicle circulating in the

outside lane.

• Consecutive dual right turns are not permitted

Delineation – Section 11 Pavement markings at roundabouts

Figure 11.1: Roundabout pavement markings, four 2 lane entry/exits

Figure 11.2: Roundabout pavement markings, two 2 lane entry/exits with two 1 lane entry/exits

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Delineation – Section 11 Pavement markings at roundabouts

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Figure 11.3: Roundabout pavement markings, four 2 lane entry/exit with one exclusive left turn lane.

Figure 11.4: Roundabout pavement markings, T junction with two 2 lane and one

1 lane entry/exit

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Delineation – Section 11 Pavement markings at roundabouts

Figure 11.5: Roundabout pavement markings, dual right turn on one approach

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For further enquiries www.rta.nsw.gov.au 13 22 13

Roads and Traffic Authority March 2008 RTA/Pub. 08.091